Oiling attachment for die-stocks.



F. H. McPHERSON.

OILING ATTACHMENT FOR DIE STOCKS.

APPLICATION FILED MAR. 1, 1916.

1,224,948 Patentvd May 8, 1917.

3 SHEETS-SHEET I.

W" N g l 3 l; N N Mm T? \3 F. H. McPHERSON.

OILING ATTACHMENT FOR DIE STOCKS.

APPLICATION FILED MAR. 1. 1916 1,224,946f Patented May8,1917.

3 SHEETS-SHEET 2.

8 mum Lion aktozuumd F. H. MCPHERSON.

OILING ATTACHMENT FOR DIE STOCKS.

APPLICATION FILED MAR. 1, I916. 1,224,946. Patented May8,1917.

3 SHEETS-SHEET 3 arr unon.

OILING ATTACHMENT FOR DIE-STOCKS.

Specification of Letters Patent.

Patented May a, rear.

Application filed March 1, 1916. Serial No. 81,423.

To all whom it may concern:

Be it known that I, FLOYD H. MoPunn- SON, a citizen of the United States, and resident of the city of Everett, county of Suehomish, State of Washington, have invented certain new and useful Improvements in Giling Attachments for Die-Stocks, of which the following is a specification.

My invention relates to die stocks, and particularly to the mechanism whereby the oiling of the dies may be more thoroughly and conveniently accomplished than by the usual method of using an oil can.

The object of my invention is to make use of the hollow handles quite generally employed for such stocks, as a reservoir for holding lubricatingoil, and the providing of means whereby oil may be fed from this reservoir to the dies or bearing surfaces of the stock.

My invention comprises certain features which will be hereinafter described and then particularly pointed out in the claims. In the accompanying drawings I have shown my invention in the form of construction which is now preferred by me.

' Figure 1 is a top view, and Fig. 2 is a side view of an ordinary type of die stock having my invention mounted thereon. r

Fig. 3 is a longitudinal section through one of the handles, showing its use as an oil reservoir and showing the pump by which the oil may be fed to the die.

Fig. 4 and Fig. 5 are. sections taken respectively upon the lines 44 and 55 of Fig. 3. Y

6 is a top view, and Fig. 7 a side view of another type of stock, showing oil feeding means for both the die and bearing surfaces of the stock;

Fig. 8 is a longitudinal section through the handle of this "type of construction,

showing a pump operated upon different principles than that of Figs. 1' and 2.

Fig. 9 is a section on the line 99 of Fig. '8.

Figs. 10 and 11 are top and side views respectively of another type of stock, showing the oil feeding pipes as inclosed within the body of the stock.

Fig. 12 is a section through one of the handles of this type of construction.

Figs. 13 and 14: are sections respectively upon the lines 13-13 and 14:14: of Fig. 12.

In the use of ordinary die stocks for cutting threads upon pipes or rods, no provision is made for oiling either the pipe being threaded or the parts of the stock, except by the application of oil from an oil can. In my. invention I make use of the hollow handle of the stock as a reservoir for the oil, and mount upon this a small pump which may be operated to force an intermittent supply of oil to the surface being threaded, or to any part of the stock mechanism desired.

In the type of construction shown in Figs. 1-5 inclusive, the pump is mounted exterior of the stock. This type of construction is one which may be applied to stocks already built of such construction as are not adapted to installation of the pump within the handle.

In modifying a stock for the application of my invention, 1 provide a plug or cap 12 to close the outer end of the hollow handle, and provide this cap or plug with an air inlet opening 13 controlled by a valve 14, which is acted upon by a spring 16 mounted in a bore 15, which opens freely to the interior chamber of the handle. Spring 16 is supported by pin 17 extending across the bore. The inner end of the handle is closed by plug 11.

The pump cylinder 2, in the form of device shown in these figures, is mounted eX- terior of the handle 1, being secured thereto by a clamping ring 23, and by the nipple which serves as the suction pipe. This suction pipe 20 is provided with a controlling valve 21, normally held closed by spring 22, which valve prevents escape of oil except when a positive suction is exerted by the pump. Nipple 22 is connected with one end of the cylinder 2. Within this cylinder is a piston 3 having a stem 30, extending through the end of the cylinder and terminating in a button 31. This piston is normally held toward the outer end of the cylinder by a spring 32.

An outer conducting pipe 4 receives the discharge from the cylinder 2, and conducts it to a point, as 42, where the discharge will be upon the surface of the pipe being threaded. The discharge end of the cylinder is connected with a block 43, having therein a bore in which is placed a relief valve 40, normally held closed by spring 41. The suction pipe 20 is also secured to the same member 43, this latter being provided with a suction port communicating with the cylinder. y

In operating this device, the hand may be slid down the handle 1 until it contacts with the button 31,.this being placed in convenient position so that this may be done without removing the hand from the handle. A slight pressure on the button forces the piston inward, and discharges a small amount of oil at the point 42 upon the pipe being threaded.

In Fig. 6 is shown a type of stock which has a member 5 adapted to be secured upon .end is secured to the block 11, which has a port communicating with the discharge nipple 44. This nipple communicates with the pipe 4 which delivers the oil to the surfaces being threaded. In one type of stock, of which that shown in Figs. 6 and 7 is an illustration, the construction forbids carrying the oil delivery pipe through the end of the handle direct to the die, it is therefore conducted through pipes 4 which are outside the stock.

Within the cylinder 24 is a piston 25, which is made long in order to give it weight, and is sufficiently loose fit in the cylinder that it will respond freely under the influence of gravity when the cylinder is in, or approaches toward, a vertical positlon. Cylinder 24 communicates by necks 60, wlth a valve chamber 6, which has an inlet open ing 61 of some length. This is controlled by a Valve 62, which may be mounted lengthwise, and is controlled in such movement by the threaded stem 63. By adjusting the position of this valve the extent of the opening 61 may be controlled, thus controlling the rate of feed to the cylinder 24. Air inlet valve 14 and spring closed oil discharge .Valve 21 are employed, as in the construction shownin Figs. 1 to 3.

In the construction shown in Figs. 10 to 13 inclusive, the cylinder 24 and the air inlet and oil discharge valves and the piston 25 are as just described. The mannenof supplying and controlling the flow of 011 to the pump cylinder is however, different. A pipe 6 communicates with cylinder 24, and has 1ts end opening toward and closely ad acent to the block 11, which closes the inner end of the handle. A screw 8 passes through this block, and has a conical point 64 positioned to enter the opening in the supply plpe 6. The effective area of this opening is determined by the position of the point of this bolt or screw.

lill r 1,224,946

In this construction rh delive from the cylinder 24 to the stock die is through the plug 11. This opening is controlled by valve 21 in the manner described. The delivery pipe 4 in this construction is inclosed entirely within the body of the stock. It is therefore less liable to injury than in the type of construction shown in the previous figures.

In Fig. 6 I have shown each handle of the stock as utilized for oil reservoirs, and have provided means for delivering the oil from one of thesereservoirs upon the surface being threaded, and from the other upon a bearing surface in the body of the stock.

In the type of construction shown in Fig. 6 and thereafter, the heavier piston will tend to move lengthwise the cylinder 24, whenever the handle approaches to vertical position. If the handle be upward the piston will move toward the stock, while if it is downward it will move backward. The former movement is a pumping movement and the latter a cylinder filling movement. It is to be noted that the pipe 6, through which this cylinder is filled extends toward the center part of the stock. This would be filled, or at least charged with oil while the handle extends upward, and even if a small amount of oil were in the reservoirs, the pipe 6 would have a sufficient amount to fur- 'nish all that was needed for any one time.

In all forms of construction shown, the air inlet valve 14 and the Valve 21, which acts as a retaining valve, are employed. There can therefore be no trouble arising from failure to admit air as the oil is removed, nor from escape of oil when the tool is not in use. It is also possible to remove the handle from the stock, as to make it more convenient to transport, without incurring any danger of oil escaping.

What I claim as my invention is:

1. A die stock having a hollow handle adapted to serve as an oil reservoir, a separate pump tube within said reservoir having an oil supply port near the end toward the die and adischarge connection from this inner end of the pump to the dies, a check valve controlling this discharge connection, and a gravity actuated piston freely "movable in the pump tube.

2. A die stock having a hollow handle adapted to serve as an oil reservoir, the inner end being provided with an oil discharge channel leading to the dies and a check valve controllin said dischar echannel, a separate tube within the hand e communicating with the said discharge channel and serving as a pump cylinder, said cylinderhaving an oil inlet port in its side near its lnner end, means for adjusting the area of said inlet port and a gravity piston within said pump cylinder.

3. A die stock having a hollow handle adapted to serve as an oil reservoir, the inner end being provided with an oil discharge channel leading to the dies and a check valve controlling said discharge channel, a separate tube within the handle communicating with the said discharge channel and serving as a pump cylinder, said cylinder having an oil inlet port in its side near its inner end, a pump supply tube connecting with said inlet port and having its supply end facing the inner end of the die stock handle, an adjusting bolt passing through the inner end of said handle and entering said pump supply tube, and a gravity actuated piston freely slidable in the pump cylinder,

4. A removable hollow handle for a die stock closed to constitute an oil reservoir, an automatic oil delivery means carried on the handle, an air inlet valve, an outwardly opening valve controlling the discharge from the oil delivering means, and a spring acting to close said oil valve.

5. A hollow die stock handle closed to constitute an oil reservoir, an air inlet valve, a pump contained within the hollow of the handle and having a gravity acting piston and an outwardly opening spring held valve controlling the oil discharge from the pump.

6. A hollow die stock handle closed to constitute an oil reservoir, an air inlet valve, a pump contained within the hollow of the handle and having a gravity acting piston and a manually adjustable valve controlling the oil supply to the pump. 7. A die stock having a removable hollow handle, said handle being closed to constitute an oil reservoir, means mounted on said handle for feeding oil to the die, and valves controlling the air inlet to and the oil discharge from said reservoir and normally acted upon to close them.

8. A die stock having a removable hollow handle, said handle being closed to constitute an oil reservoir, means mounted on said handle for feeding oil to the die, a valve controlling the oil supplied by the pump and closing toward the reservoir, and a spring acting upon said valve to close it.

Signed at Seattle, Washington, this 24th day of February 1916.

FLOYD H. MoPHERSON. 

